Moon was arrested on a felony assault complaint and was expected to be booked into the Oklahoma County jail later Monday.

About 7:20 a.m., Moon went to Edmond Memorial High School and asked to speak to a former teacher but was turned away because he did not have an appointment, said school spokeswoman Susan Parks-Schlepp. Moon left the building without incident, but school personnel alerted the school's police resource officer because of the man's demeanor, she said.

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Diana Baldwin has been an Oklahoma journalist since 1976 and came to The Oklahoman in 1991. She covered the Oklahoma City bombing and covered the downfall of Oklahoma City police forensic chemist Joyce Gilchrist misidentifying evidence. She wrote...